HOME >> BIOLOGY >> NEWS
Divers may soon wax lyrical about some new hot installation -- The water's fine

Frigid ocean depths may become a more hospitable place for scuba divers who have to spend hours underwater at temperatures just above freezing, thanks to the US Navy.

For some jobs, divers can wear "hot water suits" that rely on warm water being pumped around a suit via a hose from the surface, but the hose can get in the way. So the US Navy has long been experimenting with special materials to prevent heat loss. Now it looks as though they're finally getting somewhere.

The secret is a layer of foam containing bits of wax inside tiny plastic beads, each just a tenth the width of a human hair. These bits of wax melt and freeze as the temperature changes. While the diver is putting on the drysuit, the wax absorbs warmth from the diver's body and melts. But when the diver slips into the icy waters, the wax freezes, radiating latent heat back to the diver.

The waxes are long hydrocarbon chains that have been chosen because of the temperatures at which they change phase. To provide optimal warmth to the diver, the waxes must melt at a temperature below that of bare skin-about 33 C. Similarly, the waxes must freeze at temperatures as high as 18 C to provide enough heat to the diver.

So far, the warming effect lasts for about the first half an hour or so of the dive (Ocean Engineering, vol 26, p 547), but the US Navy wants to improve on that, says Lew Nuckols, of the US Naval Academy in Annapolis, the Navy scientist developing the suit. He is looking at various ways of extending the warming period, such as packing more of the waxes into the diving suit liner or weaving the beads into layers of synthetic fabric instead of foam.

The beads, which look like fine dust, can be placed inside fabric fibres by mixing them with the liquid polymers used to make artificial fibres. Fabrics such as polypropylene, which is water-resistant, are made by pumping a liquid polymer through a device like a spaghetti-maker. Anoth
'"/>

Contact: Claire Bowles
claire.bowles@rbi.co.uk
44-171-331-2751
New Scientist
24-Jun-1999


Page: 1 2

Related biology news :

1. Fostering Diversity in the Sciences Symposium
2. Diversity: What people, grain sorghum have in common
3. Diversity hot spots at cold seeps?
4. JGI and Diversa Corp. announce large-scale microbial sequencing collaboration
5. Diversity of species triumphs
6. Diversity of trees in forests may be caused by soil pathogens, IU biologists find
7. Undiscovered Biological Diversity: A Symposium On Bioprospecting
8. New Areas Of High Biological Diversity Discovered
9. Little-Explored African Genetic Diversity May Hold Key To Human Origins, Medical Questions
10. Researcher Finds Worlds Most Diverse Home Of Slime Molds
11. "Health Of Hanford" Conference Gathers Diverse Audience To Review And Discuss Health Issues

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Divers may soon wax lyrical about some new hot installation The water fine

(Date:10/22/2014)... Medicine® scientists helps explain how bipolar disorder affects the ... therapies to treat the mental illness. , Scientists ... method recognized with the 2014 Nobel Prize in ... from mice with bipolar-like behaviors. In the synapses (where ... structures with concentrated levels of ANK3 -- the gene ...
(Date:10/22/2014)... , Oct. 20, 2014  Leading identity analyst firm ... half of the world,s population will have a chip-based ... Europe . Asia , ... market accounting for more than 60% of all National ... Acuity,s report  -- "The Global National eID ...
(Date:10/19/2014)... in India over the last 30 years contributed ... growth during that time, according to a new ... Change ., "Energy access is fundamental to development: ... including education, communication, and health," says IIASA researcher ... increased energy access is widely agreed to be ...
Breaking Biology News(10 mins):Bipolar disorder discovery at the nano level 2Half the World's Population Will Have Chip-Based National Electronic Identity (eID) Cards by 2018 2Improved electricity access has little impact on climate change 2
(Date:10/25/2014)... , October 24, 2014 ... Corporation (NASDAQ: CYTR ), Vertex Pharmaceuticals Inc. ... ALXN ), Peregrine Pharmaceuticals Inc. (NASDAQ: ... research on these five companies can be accessed at: ... Thursday, October 23, 2014, ended on a positive note ...
(Date:10/22/2014)... BOSTON , Oct. 22, 2014  Actavis ... specialty pharmaceutical company, and Rhythm, a biopharmaceutical company, today ... to acquire Rhythm,s wholly owned subsidiary, Rhythm Health, Inc., ... for the treatment of diabetic gastroparesis and other GI ... successful Phase 2 trial of relamorelin for the treatment ...
(Date:10/22/2014)... WriteResult, LLC – a premier provider of ... a team of researchers from Yale University’s School of ... to provide electronic questionnaire data collection through use of ... in May, aims to evaluate the impact of a ... and participation in urban agriculture to impact their consumption ...
(Date:10/22/2014)... ROCKVILLE, Md. , Oct. 22, 2014   ... company developing novel pathogen-specific therapies for serious infections and ... Office has issued a Notice of Allowance for a ... product in its C. difficile program, SYN-004. This ... to SYN-004 in the U.S. and adds to the ...
Breaking Biology Technology:Biotech Stocks Technical Data - CytRx, Vertex Pharma, Alexion Pharma, Peregrine Pharma, and StemCells 2Biotech Stocks Technical Data - CytRx, Vertex Pharma, Alexion Pharma, Peregrine Pharma, and StemCells 3Biotech Stocks Technical Data - CytRx, Vertex Pharma, Alexion Pharma, Peregrine Pharma, and StemCells 4Biotech Stocks Technical Data - CytRx, Vertex Pharma, Alexion Pharma, Peregrine Pharma, and StemCells 5Actavis Signs Option to Acquire Rhythm Subsidiary and its GI Development Product, Relamorelin 2Actavis Signs Option to Acquire Rhythm Subsidiary and its GI Development Product, Relamorelin 3Actavis Signs Option to Acquire Rhythm Subsidiary and its GI Development Product, Relamorelin 4Actavis Signs Option to Acquire Rhythm Subsidiary and its GI Development Product, Relamorelin 5myPROpad™ Topic of Panel Discussion at the Yale Food Systems Symposium 2myPROpad™ Topic of Panel Discussion at the Yale Food Systems Symposium 3Synthetic Biologics Announces Allowance of Key U.S. Composition of Matter Patent for C. difficile Program 2Synthetic Biologics Announces Allowance of Key U.S. Composition of Matter Patent for C. difficile Program 3Synthetic Biologics Announces Allowance of Key U.S. Composition of Matter Patent for C. difficile Program 4
Cached News: